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3.8 KiB
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69 lines
3.8 KiB
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<!DOCTYPE HTML PUBLIC "-//W3O//DTD W3 HTML 2.0//EN">
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<!Converted with LaTeX2HTML 0.6.5 (Tue Nov 15 1994) by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds >
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<HEAD>
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<TITLE>26. Loop</TITLE>
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<BODY>
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<meta name="description" value=" Loop">
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<meta name="keywords" value="clm">
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<meta name="resource-type" value="document">
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<meta name="distribution" value="global">
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<P>
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<b>Common Lisp the Language, 2nd Edition</b>
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<BR> <HR><A NAME=tex2html4490 HREF="node236.html"><IMG ALIGN=BOTTOM ALT="next" SRC="icons/next_motif.gif"></A> <A NAME=tex2html4488 HREF="clm.html"><IMG ALIGN=BOTTOM ALT="up" SRC="icons/up_motif.gif"></A> <A NAME=tex2html4482 HREF="node234.html"><IMG ALIGN=BOTTOM ALT="previous" SRC="icons/previous_motif.gif"></A> <A NAME=tex2html4492 HREF="node1.html"><IMG ALIGN=BOTTOM ALT="contents" SRC="icons/contents_motif.gif"></A> <A NAME=tex2html4493 HREF="index.html"><IMG ALIGN=BOTTOM ALT="index" SRC="icons/index_motif.gif"></A> <BR>
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<B> Next:</B> <A NAME=tex2html4491 HREF="node236.html"> Introduction</A>
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<B>Up:</B> <A NAME=tex2html4489 HREF="clm.html">Common Lisp the Language</A>
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<B> Previous:</B> <A NAME=tex2html4483 HREF="node234.html"> Identity Function</A>
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<HR> <P>
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<H1><A NAME=SECTION003000000000000000000>26. Loop</A></H1>
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By Jon L White
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<P>
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<img align=bottom alt="change_begin" src="gif/change_begin.gif"><br>
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<A NAME=LOOP><TT>PREFACE:</TT></A>
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X3J13 voted in January 1989
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(LOOP-FACILITY) <A NAME=29319> </A>
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to adopt an extended definition of the <tt>loop</tt> macro
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as a part of the forthcoming draft Common Lisp standard.
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<P>
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This chapter presents the bulk of the Common Lisp
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Loop Facility proposal, written by Jon L White. I have
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edited it only very lightly
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to conform to the overall style of this book and have inserted a small
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number of bracketed remarks, identified by the initials GLS.
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(See the Acknowledgments to this second edition for
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acknowledgments to others who contributed to the Loop Facility proposal.)
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<P>
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<blockquote>
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- Guy L. Steele Jr.
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</blockquote>
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<br><img align=bottom alt="change_end" src="gif/change_end.gif">
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<HR>
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<UL>
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<LI> <A NAME=tex2html4494 HREF="node236.html#SECTION003010000000000000000"> Introduction</A>
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<LI> <A NAME=tex2html4495 HREF="node237.html#SECTION003020000000000000000"> How the Loop Facility Works</A>
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<LI> <A NAME=tex2html4496 HREF="node238.html#SECTION003030000000000000000"> Parsing Loop Clauses</A>
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<UL>
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<LI> <A NAME=tex2html4497 HREF="node239.html#SECTION003031000000000000000"> Order of Execution</A>
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<LI> <A NAME=tex2html4498 HREF="node240.html#SECTION003032000000000000000"> Kinds of Loop Clauses</A>
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<LI> <A NAME=tex2html4499 HREF="node241.html#SECTION003033000000000000000"> Loop Syntax</A>
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</UL>
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<LI> <A NAME=tex2html4500 HREF="node242.html#SECTION003040000000000000000"> User Extensibility</A>
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<LI> <A NAME=tex2html4501 HREF="node243.html#SECTION003050000000000000000"> Loop Constructs</A>
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<LI> <A NAME=tex2html4502 HREF="node244.html#SECTION003060000000000000000"> Iteration Control</A>
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<LI> <A NAME=tex2html4503 HREF="node245.html#SECTION003070000000000000000"> End-Test Control</A>
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<LI> <A NAME=tex2html4504 HREF="node246.html#SECTION003080000000000000000"> Value Accumulation</A>
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<LI> <A NAME=tex2html4505 HREF="node247.html#SECTION003090000000000000000"> Variable Initializations</A>
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<LI> <A NAME=tex2html4506 HREF="node248.html#SECTION0030100000000000000000"> Conditional Execution</A>
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<LI> <A NAME=tex2html4507 HREF="node249.html#SECTION0030110000000000000000"> Unconditional Execution</A>
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<LI> <A NAME=tex2html4508 HREF="node250.html#SECTION0030120000000000000000"> Miscellaneous Features</A>
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<UL>
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<LI> <A NAME=tex2html4509 HREF="node251.html#SECTION0030121000000000000000"> Data Types</A>
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<LI> <A NAME=tex2html4510 HREF="node252.html#SECTION0030122000000000000000"> Destructuring</A>
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</UL>
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</UL>
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<HR>
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<P><ADDRESS>
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AI.Repository@cs.cmu.edu
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</ADDRESS>
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</BODY>
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